In a compression wave, particles in the medium move

Aperpendicular to the direction of the wave
Cin the same direction as the wave
Bopposite of the direction of the wave
Din depends upon state of the medium

Verified Answer :

Vuk15

The particles through which compressional waves travel move in the same direction as the wave. This may be observed by fixing one end of a large spring and then compressing and extending the other end. The wave travels from one end to the other and the spring's parts move in the same direction.

its C. for those that don't like to read like me